Ok, it's possible that my bilingual ahh is misunderstanding the comment. Maybe we can try to come to an understanding?

I read that comment as "Show me where [long classnames] are in the language, standard library or <relevant ecosystem project>."

Spring is one of the biggest java libraries and quite widely used. I think it fits rather nicely, even if the example itself is fairly old.

Yeah I just think you have a fundamental misunderstanding of what the ecosystem is. Spring is used less than you think.